Table 3.

The Association between Class Risk Factors for Breast Cancer and Pathological Diagnosis of the Tumor

Item	IDC	ILC	In Situ	0.001 Total physical activity
Age, year	50.71 ± 11.34	52.90 ± 12.25	52.95 ± 11.35	12.9
Size of tumor	2.63 ± 1.51	2.72 ± 1.21	2.69 ± 1.20	12.5
Number of positive node	2.46 ± 4.42	2.75 ± 4.05	2.03 ± 4.06	10.5
Age at first pregnancy, year	21.70 ± 5.56	19.92 ± 5.91	19.58 ± 5.73	16.2
Number of gravid	2.78 ± 1.66	3.33 ± 2.29	2.89 ± 1.84	15.0
Number of previous abortion	0.66 ± 0.88	0.56 ± 0.84	1.00 ± 1.52	10.0
Duration of breastfeeding,
Months	16.18 ± 7.25	17.90 ± 7.03	15.87 ± 8.28	12.7